teleport
[F]or those unfamiliar with teleport, let me explain what’s happening with teleport first. teleport is a program (teleportd actually) that waits for the mouse to touch a side of the screen and, when it does, connects to another teleport-enabled Mac and sends all mouse input (including 2-axis scroll-wheel input) and all keyboard input (with the exception of media keys) to that machine instead of the parent. Then you touch the opposite side of the remote Mac’s screen as if you are moving from one monitor back to the main one and the connection drops, putting you back on your home machine. It’s great for having multiple Macs at the same desk as the newer versions include private-key encryption of your input as well as file drags and clipboard sync.
Wow! I need to try this out ASAP.